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ASF GitHub Bot commented on CB-13179: ------------------------------------- JiaLiPassion commented on issue #215: CB-13179:(all) invoke onEvent listener with _realReader as applyThis URL: https://github.com/apache/cordova-plugin-file/pull/215#issuecomment-422108053 @janpio, @raphinesse, `npm test` will only run `eslint`, and `CI` will run the `real test`, ``` - node /tmp/paramedic/main.js --config pr/$PLATFORM --plugin $(pwd) --shouldUseSauce --buildName travis-plugin-file-$TRAVIS_JOB_NUMBER ``` So may be I have to setup a `cordova` environment to run those `error case`. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > Cordova file plugin onEvent(such as onload) should be invoked with > _realReader as this > -------------------------------------------------------------------------------------- > > Key: CB-13179 > URL: https://issues.apache.org/jira/browse/CB-13179 > Project: Apache Cordova > Issue Type: Improvement > Components: cordova-plugin-file > Environment: Android, ios, Browser > Reporter: Jia Li > Priority: Minor > Labels: features > > When `FileReader` add onEvent listener such as `onload`, it will add the > listener to inner `_realReader` , but when it invoke the listener, it use the > FileReader as `this`. > 1. When add onload listener in application code. > ```javascript > var fileReader = new FileReader(); > fileReader.onload = function() {}; > ``` > it will call `www/FileReader.js defineEvent` > ```javascript > function defineEvent(eventName) { > utils.defineGetterSetter(FileReader.prototype, eventName, function() { > return this._realReader[eventName] || null; > }, function(value) { > this._realReader[eventName] = value; > }); > } > ``` > the listener is added to `this._realReader`. > And when the listener is triggered for example in `readSuccessCallback` > it will invoke the method with `this`. > ```javascript > this.onload(new ProgressEvent("load", {target:this})); > ``` > in the normal senario, it will ok, but when it work with some polyfilles such > as `zone.js of angular4`, it will fail because `zone.js` have some special > handling which require the `this` object be the same when add listener and > invoke listener. > https://github.com/angular/zone.js/issues/868 -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@cordova.apache.org For additional commands, e-mail: issues-h...@cordova.apache.org